Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1a7cd6b5c0989e2dec69ed99c43eddffb5b4dd4dde3e2bcd22d05671bd6a5c7d' 
  AND token = 'CIiRjjV8ZEV+W1rqpChCjlhKFILnoV6q61luYvo4yhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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