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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2284a05ab52c5594b906eb94559591fb9aabf3bcb3303fced4ba2061dde80745' 
  AND token = 'vKBM4ZQwLCzVCl5u97ksx9KsbKVxsxsE9a+3vnKfHF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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