Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '149599c479c49379499b889a05e3e597dce0b532ac35d3a06521ff1de305fd90' 
  AND token = 'bm39l70UMjTfaFA32hu4OIum9co+9zmoekHcjH+KORw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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