Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa0dcf85b9b19ea09b02faa8a54a0a04abc9efb721ed495f9080021b2c30fe45' 
  AND token = 'IV7/x1ojJ3lenu04G+F5zGnswSRg+M61EPncqD5XuDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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