Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1952ac4d9afb586e31f6c2ad238a423b4c1052e326da7218c40c070da62ec300' 
  AND token = 'E5dVxc0iD7CD2wbiC858RINatbqMnHPtDHFKS7y9w0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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