Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e515acf5bb0a0fb6a7703d2a4024bd9504a66d7454e6c3ce90c9e62c8e1ae5d1' 
  AND token = 'L61hR6TX/o3FPW1Bka4nmiTzrQlkjcPTTY3fa5J3Xm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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