Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '342a7d8590608d97fef7f3a4d9d4fa2446baf4c484460ee7131c5d1c2c27a672' 
  AND token = 'T1JxgJHTtKk5fS2tqN2TwLGD7EdXk7TrC2Q54p6sBRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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