Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '51095bf18f31e5d686e23613f5596462850d327bf27fd4362ef817fd535a8997' 
  AND token = '1NWkyplUVwtpia5ZR6MKZ9pHxiRhbY4hZfy1ikscrrg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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