Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5b489c5e0eeef6f9b2860d61931f2b3e30a1c2a17a3e0a164380776cb8fa6704' 
  AND token = '3zeu4qRHi/mCptBW5cA+sTLxyirfyaF8JoAiDX9fMS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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