SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f9d6e68d3323e82e87d3caec9f452d75cb6d1745a579cf16df52540174a9418' 
  AND token = 'LPnH8jJ9L/ZAWLt4YQJKSSTWAo4BL7mHWxwv0reM8Hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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