Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e08901c4c73e1ec66f776f6270629366d726d911ade5a3b94043ff943ca7d590' 
  AND token = 'z+Gmc9lokg0tK2/0wR2JqcMR1Yr3SHWA2h5nZ8/1ECU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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