Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eacacf2f596e1678083334a86882cb80a794656fdced960adf528438063ee46e' 
  AND token = 'tiMYSiqzV71bklaPV6pJmd2Uie9GaBhE/vzQ4pwkDvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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