Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8dc7c082c9b14af2041ca3cfdd93ad265e10ebadb37f294834e821edca3ad7b' 
  AND token = '3N2MaFHF7LwEgFrt22sNr6GJBCARLjBndfyk6/7QLUI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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