Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a87931385f3d0265de63410acd76937b4d47bb70a3314d8fa4378115d192d379' 
  AND token = '0wS5bet5Blne6ZAyLm3Yl6ruZ7QpxXvynxzes16LdiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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