Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff80aeb15e9a2a073a489d756be8d75cfa5080c7057e3e984f5fac2e709ac9c4' 
  AND token = 'L1Gyk0q0YijNdw6j2SrsgjVB6DUISF14c0EuMD9uIUA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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