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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '032902d8120d55e88bf96de62c2204de10d6b51d920a53bef835d80aa3d64526' 
  AND token = 'GgjdbNwqkHqK5s7+X+PNrY2TfKmHuWFxVHsk+fgOeEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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