Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a0a5a1b3bcca00522d4dad4ac101a6b6a314f79f499cb633df8bb721043a3b5' 
  AND token = 'qin4uCgeZso4QIMP3Zo3/oeW6t1vvCQuTXyCYtzTKJ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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