Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b62c67827f8b7813fdc889ae4564411aea37a444c76d3d623cde50b562a1f419' 
  AND token = 'mpV0FDN8n9tNe98WrvN1Xejm/cqk8JaswF3ukDwFbgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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