Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05fb770e4b361df03b5a9be60a92df31504ef35df19c8c6984c838a3f7b1fb51' 
  AND token = '+mctWrSqlAAIebkH7voCF2H7oYj6uRAJ97xENJGaDoM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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