Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a565c90211ab4fd5a218adac7354c98895ad96f84bb051c377c0eded10243ec1' 
  AND token = 'u4sv3xgouZNUETdr1yx5jHRLalxnGmUtU++ULW99RoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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