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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '986dea01c90815b73f11679988b92bc25f542d658a5d1109f390cd5f85bcaf94' 
  AND token = 'yae/iwD8htp9iPHRjoIF8Mxku0G9OKcNkNrDmBec6EM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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