Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c982b7422726ff2ec80e3efe35d3238e507f40eba61ccb186cd859894e836960' 
  AND token = 's1XWUCDa4N5Bar3Hq+Dy2Z83jVL4S6pX93xIzDGE6vg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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