Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0efa060037bd62235c0223424b1e71be4dca8b08b06c5dea0d2a785f06e8a75f' 
  AND token = 'OqMImlb+E+3ilTSIRlI8I8vkGhIcFI2ZS8gWkeHeoUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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