Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f72c241088dd5a813866122b2e5d47a6ec3b24901aa8b12e06bf7deaa8437d1' 
  AND token = 'lwKD1+Wcdnz5e99c+GGM8A0qBeuBTnHaIDNHHM77zuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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