Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b301626ad07f23129a9b970267db1d5e57f17ef6968df693580fdf46668df38e' 
  AND token = 'QJmG20ye3Zivm9iMaGpqj7X1f+8uKJj3azsQnc3HQWE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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