Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e2697e0299a038ce19414520e395191c52ab5816f0bd1bb26aebd2dded88492' 
  AND token = 'J78JBm4e4Lo53heR8GUKsai2Al91eD44Qj10ZU54om4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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