SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4960ac9b882bb44906b01186d2776117c4b010e279c7f56537f426b9a5df635f' 
  AND token = 'a/vQyhuPli9uV7kAHK1twBnTrsq52yMLDzBD1nawF+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 2.53178

JSON explain

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