Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea1cdff338e3ea5b236c2ef7459f9219c3773a2a5d8496452d646da30e52e7ab' 
  AND token = 'Haa5Bn8W1heWI5YKfYRVREY0w4cgfGXZqjQoOfFFWrY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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