SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16600fac83ac08e9fc912ab4c46e7fc1a4a57f2c69844eedb9d7a2ac023ef44d' 
  AND token = 'KyIZ4m63JDQdv2hdX/Bg6v6JNxEqs75+5biFu6Yu1jY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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