Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba27017124cb2c1a46930768606fc32e935c47abcdcaa64fcc3d0e2d49b60042' 
  AND token = 'lu99i6v6pRS/0Rvicvfk2tmJjC0YIfAS1e7hJQJ/APE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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