Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '70be55bc8aa8cc4c3e2f309eff8970a4b3742aa27902b32440f493096e0cc484' 
  AND token = '/ZtD5Z2gCYEEwtx5WlxtnW/tLUaAaTVf7qtafsGEdj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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