Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ded03ea153e51efb9c0b5bf08ced39fc0859c88a49b29cb6ef2c00810220d48d' 
  AND token = 'BIp8HYrb/Uh6ASYvO2C4CwiV87e4UCe3smuBgQXnUA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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