Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34c2fd868c0d651ad0c06bbe10b61b5dcfa1f21be063aa3cdd43570f32124c5a' 
  AND token = 'c220gaF6CNgghtk4d26d38F4BEwV1uPUZXtKr7z9ZzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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