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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ed6349956692cb52c34a3fce5a8037a348775104c5cc8f75fa228f431e84882' 
  AND token = 'Fap6sNuBgZandHR2FYLG/t1icCcb0+V78VzbU/BU1nM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}