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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed09b752143e4edf8dc94f4f08d525e1d35af588f9d44c5b34a4ca04b13f51af' 
  AND token = 'PEYaoL+qj+EPLXGVRUXcGpIYoK54+R+J43U3Bn45/uU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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