Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caa32228affb834eb471067f5e612dfbedd320838ca512017a0021ba7a615ad8' 
  AND token = 'hQn+GclCvA42HXGYEufhygQhuoWNktiWDCMpovVeQQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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