Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26ea8e182e4e18507b174c1d45337782f405e2d65d6f11cf1b82d33b72884d56' 
  AND token = 'QFRbS2sHaXdrsY+kxXjZp2xpuPzjkqJG4Lg5/H5Su+A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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