Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '972e8cd042bafb2a1b20e4320036c7da188e98d1d32d7eccad9d11747f4a8fcc' 
  AND token = 'WpsQG/IwDKMi9UsYE+M+nDqe58mNmPLc51bWeVJ+nNg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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