Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e087e29ded187a472e24912b7f28c68b3cac06bd2161c1ea45c2b7782870f55' 
  AND token = 'xC3XKEFxnrDhjCxW9UGDCYOIId752w8E036KBOizB74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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