SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e70424232c8bf0551a249854d07c301ed6e76090b34b119a0ad39955242bf4d' 
  AND token = 'NHtkr9GG4vMBcrqVfZGJ+CyPnNw8YjiZ/JNos4Lha1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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