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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a513c50fd30825e8dd5a5cc24fee1acf83d54fd4ee9ba69777089cadabaf0d6' 
  AND token = 'TfU2Ok4re/734o1FYSr/CaiWPEL1iEzXcNXinWZUa8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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