Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7193e46f2cca90c285ced732759cedbe91c353e1011fc2d637f9cb5f5f83cad8' 
  AND token = 'bXKd3lKQGyRCieDtKodDbM23XpFz6Q2Hgm+OaWipuVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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