Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd722e516737bb464a28e7a1182d8cdc5c81e0ffc6c5814cd758903bfb8380a35' 
  AND token = 'PwaQPGygfHi8i58qlLMRLy9ZtSIH/RDh/H4SVsTc2EA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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