SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5922c2fa571fe7cb5a4735d646b8c9ad0716fc4a83b371fcf94043da167c91f1' 
  AND token = 'hv2dqMEFUdefBLkLaS2TgG+qOz+D9JXeyykR09CCsYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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