Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5255d1253b13dd4ee104680ebeb169629143817bb2e481636bfd2471aaff9b7' 
  AND token = 'AHlX2fVF5/teRpEXL+2MXYIhrUK+yPaLau3EnciXg74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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