SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a01cced76c55f9463bb1830dcb54e6af0f8a55111b15a237a19df513144bbf9' 
  AND token = 'G30yDymO7m857yyYeFd+4eDHnGSze0qCa2A41AbvzD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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