Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6869f7126a63af0c13cdab5ed3188dd37f10199cd98d36df6bb89eeef6dbaf5b' 
  AND token = 'hBFYQR4m8uVcHR7MkYnw6nSRk1dRSNq8pwDDMY7bQU4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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