Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '707ed38c8cf1d8b87ea2b9511f491620d2fa79c1620c9772b622decaff79424c' 
  AND token = '+ivYLzw6xnguArL/sewmkomddYJDUjuSPeWdVFW1E6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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