SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22f2ca3be385490bc94a5f03c4166fd26a2fef4471f54762f756e2c19782b4fc' 
  AND token = '9+d1vkBxxOblMB5TRHNdz7iHpnB0kFt0Gs/IU+2ZU+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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