Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f748a527fa7be42023aec213029c40f5db2b386652ea7e587fb619095c1a8f49' 
  AND token = 'BQfFGWBsKyzUtc95j3LGMot7YJTdRT3Tw6l72JrB8VA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}