Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2a12b45234187a3814bed7b331d9b5a62d2e23c8166cbbc7b54043b95b38c32' 
  AND token = 'J1euhjV/wFeigZI2QAWdsRXjPaT7ZF89PtJXzEue1gk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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