Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '652ff7436a470d90c8e0fed1a21055177b0fba96dd21857997aeb7ab7ddd71ed' 
  AND token = '4BvPTAEzTLIhxsL0XLsqvmpd6V1eONnayqlmgoq9mgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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