Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f62274c80cb8d73f9f6cdddf8579cb9e9aadff5841be8d0be13af1028d0595de' 
  AND token = '4NTzvwcc9UzpYHLVZ7qc2FsaOAjBrSLEFe95jleILYA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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