Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b824649a198d23781e4feaa2fc92396925984855191478e4a176bc9658a966d2' 
  AND token = 'MOAa/8sMJgWa+y8Mm0ndxRw8orbP3C7pLyXHS0CPRgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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