Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7096ac11c6505968056dee6c518babea1887ca65797be2de1456054facc345d' 
  AND token = 'PPnqbs9Xc7nf9yovipvMrLlljxod1RVow/ILUy3+KYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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