Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30eae8ee802ef4142a01f36697716a16ad97d5e1778d5c263df30694fefe83ed' 
  AND token = 'qdxa6mplJbei1UkH8VxM2C73lInV1Jbso/NB/KR0eyY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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