Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9bdeaceb0fdcc4036dcda500e800ab043fbe0eee8eca6f798ba263dcc66b305' 
  AND token = 'AyIhFFvbgmG1oyXvs++5lfaNC7hN/ySx6JSL9Fq1HjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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