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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79b80b0ba2b92d0cb1ca0bfbba16f0412b376ccb6cc01c34703e4cd2d5ad9813' 
  AND token = 'WVgmDX4l1mn+hFO/ojbJDZKfgD8jb3naylz3I9htZNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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