Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bacdbc178b134ce88c9ecfecdf82d1dfeb0cae30d1cdc3d139ce614674412b0c' 
  AND token = 'O7mdM+BlYlu5ceQ+6WIRjOJecuo3geTtlO+xh2WFOe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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